1920] Alexander: Crane Flies From Formosa 261 



Abdomen light brown, the first tergite darker medially; segments 

 five and six somewhat darker colored. 



Habitat: Formosa. Holotype, cT, Arisan, April 24, 1917 

 (T. Shiraki) No. 1348. 



Dictenidia Brulle. 

 Dictenidia formosana sp. n. 



General coloration yellow, the mesonotum shiny black; posterior 

 legs larger than the others, the tibia with a brown ring before mid- 

 length and with the tips broadly dark brown; wings yellowish, the 

 apex narrowly dark brown. 



Male — Length about 11.5 mm. ; wing, 11.6 mm. 



Frontal prolongation of head and palpi yellow. Antennae with the 

 scapal segments yellow, the flagellum brown, the segments indistinctly 

 darker basally. Head light yellow; vertex obscure yellow with a T-- 

 shaped black mark, the arms of the T passing to the eyes, the stem 

 continued caudad on to the occiput. 



Mesonotum obscure brownish yellow, the praescutum and scutal 

 lobes shiny black. Pleura yellow. Halteres yellow, the knobs brown. 

 Legs with the coxae and trochanters yellow; fore and middle legs light 

 yellowish brown, the tarsi darker; posterior legs much longer and 

 stouter, the tibiae yellow with a broad, dark brown ring before mid- 

 length and with the tips rather broadly brownish black; tarsi brownish 

 black. Wings with a strong yellowish tinge, deepest basally and in the 

 costal region, more grayish in the posterior and anal cells; wing-tip 

 brown, this occupying the ends of cells Ro to Mi; stigma rather small, 

 sub-rectangular, dark brown; a faint dark seam along the cord, most 

 evident on the basal deflection of i?4+5, r-m and the basal deflection of 

 Cui; veins dark brown; numerous macrotrichias in the apices of cells 

 R3 to Ml, confined to the central portions of the cells. 



Abdomen obscure yellow, the tergites with an interrupted dorso- 

 median stripe; segments eight and nine shiny black. Hypopygium 

 cylindrical, not conspicuously enlarged. 



Habitat: Formosa. Holotype, cf, Funkiko, April 25, 1917 

 (T. Shiraki) No. 1329. 



Dictenidia formosana is much more nearly allied to the 

 genotype, D. bimacidata (Linnaeus) of Europe than to D. 

 fasciata Coquillett of Japan. It is readily told from bimaculata 

 by the coloration of the posterior legs and the great reduction in 

 the size of the dark band along the cord of the wing. Mr. 

 Edwards informs me that D. horikawce Matsumura is a Psellio- 

 phora rather than a Dictenidia. None of the dozen species of the 

 former genus known to the writer possesses macrotrichiae in the 

 apical cells of the wing, a condition that is well defined in all 



